- Fixed ``PyProxyBase.__iter__()`` to return the result of
  ``PyProxyBase._wrapped.__iter__`` if available, otherwise fall back to
  Python internals. The previous implementation always created a generator.

- Fixed ``PyProxyBase.__setattr__()`` to allow setting of properties on the
  proxy itself. This is needed to properly allow proxy extensions as was
  evidenced int he ``zope.security.decorator`` module.
Preparing release 4.1.2
Back to development: 4.1.3